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t <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />The check valve was installed per plan. <br />Geotechnical Testin <br />The coarseness of the bedding cover (filter) material, and backfill precluded conventional <br />density testing. Mechanical gradation tests were performed on the backfill material, and <br />bedding filter materials. <br />Conclusions <br />Based on our observations, and past experience, it is our opinion that the under drain was <br />installed in substantial conformance with plans and specifications. <br />Respectfully Submitted <br />Douglas L. House <br />Senior Engineer <br />Attachments: <br />1.) Photographs <br />2.) Gradation Results <br />3.) As -Built Drawings <br />4.) Survey As -Built Shots <br />DeWsy Consultants, LLC. <br />747 Sheridan Boulevard, Suite 2A, Lakewood, Colorado 80214 (303) 238-1770 (303) 238-1741 Ea_X <br />